6 min read
TikTok Shop: Ads, Fees, and Margin Basics for Sellers
Why TikTok Shop margins swing fast, which costs to refresh weekly, and how to align creative testing with contribution margin.
Published: 2026-04-24
Why volatility is normal
Creative fatigue, CPM swings, and fulfillment promos change unit economics weekly. Static spreadsheets fall behind unless you refresh allocation discipline.
What to refresh weekly
Ad cost per order, return rate, and any subsidy or shipping promo that changes realized selling price.
- Separate hero SKUs from tests until data stabilizes
- Watch refund reasons that signal quality or sizing issues
Margin guardrails
Pair net profit with the min revenue ROAS guardrail from the calculator, then compare to in-platform ROAS with a documented attribution caveat.